Hi Florian, Did you check the IO load on the SPM host during the backup? If you have 1Gbit network then the maximum theoretical IO is restricted to 100MB/s . So if you get 20GB raw preallocated disk then a single disk backup will be about: 20/0.08/3600 hours x 3times~10mins: .08 is 20% overhead,3time for the clone-export-deletesnap process. Vdsm has also restriction on the migration process to avoid the network saturation. Check the Cluster properties: this is available for the 4.0 capable clusters. or set the migration_max_bandwidth in vdsm.conf on the hosts. Am 05.01.2017 6:27 nachm. schrieb "Florian Nolden" <f.nolden@xilloc.com>:
Hallo everyone,
I would like to update my Ovirt installation but, before that I would like to create proper VM backups. Currently I try to automate the backups and I use the implementation of the following project. https://github.com/wefixit-AT/oVirtBackup
The main idea is to use the Ovirt-API to trigger a snapshot, create a new VM from the snapshot, delete the snapshot, export the vm to the export domain, delete the vm.
This process takes even with only a 20 GB vm disk 55 Minutes. I have now 21 VMs with average 30 GB HDD space, that would mean that the backup job runs 22 hours.
Is there something wrong with my setup? Config? Is there a better way to automate backups? Is anyone else doing VM Exports as backup or are you just using snapshots?
Specs: HA Cluster 3 Nodes each has: 2x 6x 2.96 GHz, 96 GB RAM, 120 GB HDD for CentOS7, 1 TB SSD VM-Storage (Gluster FS), 4x 1 GBit LAN Bond, 4x 1GBit SAN Bond (Gluster Network, connection to Backup NAS/ Export Domain) Ovirt 4.0.3
The script output: Jan 05 14:12:16: Start backup for: wiki (20 GB) Jan 05 14:12:17: Snapshot creation started ... Jan 05 14:12:30: Snapshot created Jan 05 14:12:40: Clone into VM started ... Jan 05 14:36:37: Cloning finished Jan 05 14:36:38: Snapshot deletion started ... Jan 05 14:59:27: Snapshots deleted Jan 05 14:59:28: Export started ... Jan 05 15:07:09: Exporting finished Jan 05 15:07:09: Delete cloned VM started ... Jan 05 15:07:15: Cloned VM deleted Jan 05 15:07:15: Duration: 55:0 minutes Jan 05 15:07:15: VM exported as wiki_BACKUP_010516 Jan 05 15:07:15: Backup done for: wiki Jan 05 15:07:15: All backups done
Thanks, Florain
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